Floppy,CD,DVD then

First it was the 1.44 MB Floppy disk, and then came the CD (compact drive) with around 700MB of storage capacity and then the DVD (Digital video disc) with 4.5 GB. While Blu ray is in the list, Enhanced Versatile Disk (EVD) was released. It is considered to be the next digital disc technology, estimated to offer five times higher definition than DVD players. It doesn’t seem to have any change in storage capacity rather the mechanism of storage and retrieval should differ.